Novel or improved means for use more especially in displaying and changing musical score



N. CARRINGTON NOVEL OR IMPROVED MEANS FOR USE MORE 2,401,612v ESPECIALLY IN June 4, 1946.

DISPLAYING AND` CHANGING MUSICAL SCORE Filed Dec. 8, 1943 5 Sheets-Sheetv l .aq r////////,}

June 4, 1946 B. N. cARRl M TON Zllollz NOVEL OR IMPRO MEANS R MORE PECIALLY DISPLAYI AN GING MUSICA CORE M F" d Dec. 8, 1943 5 Sheets-Sheet 2 ice Nom/1 @err/@TMI June 4, 1945. B. N. CARRINGTON 2,401,612

NOVEL 0R IMPROVED MEANS FOR USE MORE ESPECIALLY IN DISPLAYING AND CHANGING MUSICAL SCORE I Filed Dec. .8, 1943 5 Sheets-Sheet 5 I rl verd'. r' 756015* (Ice, /V-Y'ab Carri/13 'Conl June 4, 1946. B. N. CARRINGTON. 2,401,612

NOVEL OR IMPROVED MEANS FOR USE MORE ESPECIALLY IN DISPLAYING AND CHANGING MUSICAL SCORE Filed Dec.

8. 1945 5 sheets-sheet 4 V B. N. cARRlNG-roN 2,401,612 NOVEL OR IMPROVED MEANS FOR USE MORE ESPECIALLY IN DISPLAYING AND CHANGING MUSICAL SCORE Filed DeC. 8, 1943 5, Sheets-Sheet 5 June 4, 19g/16.

Patented June 4, 1946 NOVEL OR IMPROVED MEANS FOR USE MORE ESPECIALLY IN DISPLAYING AND CHANGING MUSICAL SCORE Beatrice Norah Carrington, Retford, England 8, 1943, Serial No. 513,449 In Great Britain November 2.6, 1942 Application December 10 Claims. 1

The invention relates more especially to musical score used by members of an orchestra, and has for its main object to provide novel or improved means whereby such score may be displayed in an improved manner and changed during the playing of theVA orchestra. The invention is, however, applicable in other cases where matter under control at a given place is required to be displayed at another or other places.

Describing the invention as applied to displaying musical score it consists in photographic reproduction Vof the music sheets in miniature (say 21/2 inches by 2 inches) to produce transparencies which are set in a frame or number of frames and used, in conjunction with a projector or projectors, to throw images of the score, one by one, on to a suitable screen in view of the respective instrumentalist, who may himself change the image either directly by hand or through the agency of electrical means, or the images of all or some of the projectors may be changed simultaneously from one point by suitable Yelectric connections.

Two embodiments of the invention are described with reference to the accompanying drawings in somewhat diagrammatic form. Of these drawingsl Figure 1 is a front elevation partly broken away to illustrate the controlling instrument hereinafter termed the console.

Figure 2 is a longitudinal Vsectional View the section being taken on the line 2, 2, of Figure 1.

Figure 3 is a fragmentary sectional View the section being taken in the plane indicated bythe line 3, 3, of Figure 2; t Figure 4 is a transverse sectional View of the console, the section being taken in the plane indicated by the line 4, 4, of Figure 2.

Figure 5 is a vertical transverse sectional view of one of the displaying units hereinafter referred to as projectors.` V Y Figure 6 is aplan view of the projector shown in Figure 5 but with'thetop cover removed.

Figure '1 is a fragmentary sectional plan View, the section being taken the line 1,'1, of Figure 5. Y Y

Figure 8 is a. fragmentary sectional plan View the section being taken'in the plane indicatedby the line 8, 8, of Figure 5. l

Figure 9 is a wiring diagram.

Figure 10 isan outside perspective view of the projector shown to a reduced scale.

. Figurelllis a fragmentary plan View showing details oi the disc.

Referring first to (shown in Figures 1 fto Figures 1 to v9, .the console 20 4) comprises ani inner disc in the plane indicated by 31, 31, pivoted at 38 to one` or dial 2| and an outer disc or dial 22 each having a set-of dialling tabs numbered from 1 to 9 and to 0. The tabs on the inner disc 2| indicate units and the tabs on the outer disc 22 indicate tens. The discs are operated in a manner similar to that employed with dialling on telephones, that is to say the operator places his finger in the desired tab of each disc and in each case brings it round to a stop 23. This movement of each dial sets up electric impulses which aretransmitted to the several projectors of which one `is shown and indicated by the numeral 24.

In each projector 24 is a number of discs 25 adapted to be turned about a central spindle 26. The discs 25 are turned one at a time by electric impulses transmitted by operation of the inner dialling disc 2|. The Vdiscs 25 are turnably mounted upon the top of an externally screwed sleeve 21 which islowered and raised by impulses regulated by the outer dialling disc 22. The discs 25 are apertured to receive transparencies upon which sheets of the score are depicted after the manner of lantern slides. l 4

By raising the discs to bring the appropriate disc to the iirst or innerl focal plane and by turning the said disc to cause the appropriate transparency to come into the rays transmitted by a lamp 65,. an enlarged replica of the transparency is projected on to ascreen` 66 Vat the top of the projector (see Figure 10).` l

The means for producing theelectric impulses by the discs 2| and 22 ofthe console will now be described with reference to Figures 1 to 4 and 9: The inner dial 2| is secured on the outer end of a sleeve 28 by means of an inner screwed collar` 29 and outer screwed nut 30. Keyedon the sleeve 28 is a wheel 3| shown only in Figure 2 but it is similar to another wheel 32shown in Figures 2 and .4. The wheel 32 is keyed to a second sleeve 33 turnable on the sleeve 28 and having secured to its outer end the outer dial 22, by means of a nut 34 screwed on the end of the sleeve 33 and pressing the disc 22 up against a shoulder on the sleeve. l

The `wheel 32 (see Figures 2 and 4) has notches 35 cut in its periphery and with these notches engages a pin 36 carried by a pair of spring arms of the bolts 39 which secure parts ofthe casing hereinafter described. Hence, when the wheel 32 is rotated by rotation of the dial 22, it causes the arms 31 to rock and make a succession of contacts with one of two contact members 38, 38 thus successively sending electric impulses to each of the projectors 24. The Wheel 32 with the dial 22 is returned to the nor- Y friction disc 'IM within the casing of the console.

mal position (as indicated in Figure 1) by a scroll spring 8S (shown in section only in Figure 2). In order to retain the wheel 32 in the position to which it has been dialled it has integral with it a ratchet wheel 48 (see Figures 2 and 3) engaged by a pawl 4| pivoted to a toothed wheel 42 turnably mounted on the sleeve v33 and this latter is normally held from turning by a detent 43. Thus the wheel 32 can turn in one direction as the pawl 4| can click over the teeth of the wheel 40 but it is held from turning back. The detent 43, however, is carried on an armature 44 which, when attracted by the core of a coil 45, frees the wheel 42 and allows it, together with the wheel 45, wheel 32 and dial 22, to return to their normal positions by the action of the scroll spring 86. The wheel ,3| has notches 48 (see Figure 2) engaged by arms 4'| similar to the arms 31 and adapted to engage against contacts 48. Thus when the disc 2| is dialled electric impulses are also; sent to the projectors. The wheel 3| is turned against the force of a scroll spring 49; and, to prevent the return of the wheel 3| (and dial 2|), a brake wheel 58 is keyed on the end of the sleeve 28 and engages frictionally against a keyed on an arbor 52 which passes freely through the sleeve 28. The arbor 52. is pressed forwardly by a coil spring 53 to press the disc 5| against the brake wheel 50. The d-iso 5| is kept from turning by the provision of a square 54 on the' end of the arbor 52 engaging in a. square hole in a xed cover platev55. The forward end of the arbor 52 is provided with a pressbutton 56. The sleeves 28 and 33 are supported in bearings of two partition walls ||3 and Between the disc 5| and the spring 53 is a pair of spring arms 58a adaptedv to make contact (when the knob 55 is pressed) with a contact ring 51 which closes another circuit `to the projectors. The pressing ofthe knob 58 presses the disc 5| out of engagement with the brake wheel 55 andso allows the wheel 3| anddial 2| to return to normal.,` The details of the` projector 24 will now` be described. The discs 25 are spaced apart by spacing discs v58 each of which has apertures housing rollers 59 by which one disc 25 is turnably supported, from the disc below. The lowermost spaci118 discu58 rests uponthe head 69 of the hollow double threaded screw/21 which is free for upand-down movement butis held from turning by a bargil the ends oi'which engagein vertical slots orA twoV brackets 52. carried on a lid (i3-of an internal casingy 54 within the projector casing.

Engaging on. the threads of the screw 2l is anut Gil mounted in ball bearings 69 of theylid53, and integral with the nut 6871s a wide sleevefm which has integral with it a wheel 1| Aprovided with peripheral notches 'l2 (see especially Figure 7).

f Thesenotchesare engaged by a pawl 'I3 pivotally mounted on an arm 14 pivoted on the sleeve 'I0 and supported by acollar thereon. Secured to the outer end 0f the arm 14 is the curved core 'i6V (see Figure '7) of a sector-shaped solenoid 'J1 secured in the casing 64. lThe `core isdrawn in, when the solenoid `is excited., against the force of a coil spring 71'; The pawl 13 has two teeth 18, l5, the tooth 18 being normally `in engagement with one of the notches l2 of the wheel li and itis held in engagement by an arm of a double spring 89 engaging on either side of a pin 8| o'n the core 82xof a solenoid 83 mounted on the arm le. v'Ihe core is pressed out by an internal spring (not shown). draws in the` core 82 Vand reverses the' action of When the solenoid 83 is eXcited'fit the pawl i3. The solenoid 'I1 receives impulses from the console as above described corresponding in number to the number on the tab operated on the dial 22. The screwed sleeve 2l is therefore turned to lower the discs 25 until the appropriate disc comes to the inner focal plane, this latter being just in front of a'v condenser 84 carried by a bracket 85 secured in the projector casing. f

The spindle 26 already referred to extends up through the sleeve '19, nut 68, screwed sleeve 21 and discs 25 and is journalled in the bottom wall of the projector and in a cover plate 31 which also mounts the projector lens 88. Set in the spindle 26 is a projection 89 and each disc 25 has in its inner periphery a notch 90. The projection 85 lies in the notch 90 of whichever disc 25 lies in the inner focal plane, so that rotation of the spindle 26 will rotate the said disc but none of the others. Those of the discs 25 which are not in the inner focal plane are locked from turning by a guard plate 9| which enters peripheral notches 92 of the discs 25 (see Figure 6) but the guard plate itself has a notch S3 (see Figurej), so that the disc 25 which lies in the inner focal plane is free to be turned bythe spindle 26., n

Keyed on the spindle 28 is a wheel 94 having notches 95 (see Figure 8) engaged by a double pawl 96 similar in all respects to the pawl 13 already described, and actuated inl-the same Way by a solenoid 91 and reversed by asolenoid 98; Thus the spindle 25 and the appropriate disc 25 is turned in either direction.

It is important that fore the dialling of the disc 2| forV all numbers above 9; because, if in suchcase the disc 2| were dialled rst, the lowermostdisc would turn and its notch 9e come out of register with the locking plate 9|, thereby preventing the discs 25 being lowered by therscrewed sleeve 21 which would cause jamming of the parts and possible injury thereto. VIn order to prevent this contingency a disc 99 is secured on lthe lower end of the spindle 23 said disc having a notch |00 (see Figure 9) into which a tooth |9| on a switch arm |02 is adapted to enter when the spindle is in normal position. When'so entered the arm |92 engages two contacts |03 and closes the circuit tothe solenoid 11. At other positions of the disc 99 the current to the solenoid 11 is cut 01T.

It willnb'e seenfrom Figure 6'that there are eleven aperturesin each disc, one |94 being a round 'aperture ofsuiiicient diameter to allow the respective disc to pass down over the tube which carries the condenser 84. h-vlilachof 7th-eA other apertures |05 isadapted to carry a transparency |03 (see Figures Gand 11) slid intojgrOoves formed in the slides and inner end ofeach aperture. Opposite each aperture the periphery of eachdisc may have a half-moon recess U1 to facilitateremoval of a `transparency Afrom any one of the recesses. Thus there may be ten transparencies in eachdisc 25; Y Y Y It will -lhave been noted that therel .are ten discs 25 so that there may be any -number of transparencies up to one hundred. 1

Assuming that thelconductor of l.the orchestra desired to have transparency No. 67 projected en the screen of each projector, having'seen that both `dials were in normalA positions, he. wouldpress tab 6 on, the outer dial. In doing thishe would cause the arms 31 to contact six times with the right hand pair of two studs 38 `'allowingv current-to ow from positvemain through a lrelay coil |39 back to negative main mee-Figure the dise 22 be diaree be- 9). This will cause the relay |39 to be excited six times and so close an armature |49 against acontact |4| six times Aand pass current, in six impulses, to the solenoid 11 but passing through the switch arm |92. The solenoid 11 acting through the pawl A13 gives six turning impulses to the wheel 1| in an anti-clockwise direction and the nut 68 turns with it, lowering the screwed sleeve 21 until the sixth disc (from the bottom) comes into the inner focal plane. .The said disc is then opposite the notch 93 in the guard plate 9| so that it is no longer locked against turning. During dialling of the disc 22 its wheel 49.- clicked past the pawl 4|. After dialling, it therefore remains in the position dialled,because the wheel 42 carrying the pawl 4| is being held by the detent `43. Y Next, 'IA is-dialled on the inner dial. This rocks the arm 41 seven times into `Contact withthe right hand pair of terminals 48` each time causing excitation of a relay |49. This causes current to ow by seven pulses to the solenoid 91 (see Figure 8) which, through the pawl 9S and wheel 94, turns the spindle 29. The projection 89 on the spindle is now lying in the inner notch of the sixth disc so that it causes that disc only to turn until No. 67 transparency comes into position to be projected on to the screen. The turning of the spindle 26 turns the disc 99 (see Figure and this forces the tooth I9! (see Figure 9) out of the notch |90 and breaks the circuit to the solenoid 11 so that, if the outer disc be inadvertently dialled again, it will have no effect. After dialling the disc 2| is held from returning by the brake device 50, 5|.

When it is desired to change a transparency the parts must first be brought back to their normal positions. This is effected simply by pressing the knob 56. This has two main effects: (i) It frees the brake device 59, -5| (see Figure 2) and allows the disc 2| to go back by the action of the scroll spring 49. (ii) It makes contact between the arms 55a and the Contact ring 51. This itself has two effects: (a) It causes excitation of the solenoid 45 freeing the wheel 42 thus allowing the wheel 32 and disc 22 to go back under the action of the scroll spring 86. (b) It causes excitation of the two solenoids 83 and 98 with consequent reversal of the two pawls 13 and 96.

The wheels 3| and 32, in going back, again rock the arms 31, 41, so that the solenoids 11, 91, are again excited by impulses. Thus they bring all the discs 25 back to their normal positions. The solenoids 45, 83 and -98 (see Figure 9) are shown as connected in series for the sake of simplicity, but they might, of course, be connected in parallel, if desired.

||5 is a fan driven by a motor H5 for cooling the interior of the projector.

In order to operate the discs 25 o-f each projector by a performer, press buttons may be provided to switch on current to the solenoids 11 and 91 and to thereversing solenoids 83 and 9B.

The phrase set of discs and the term disc as used inthe following claims is also to be construed as covering a pair of drums and a drum, respectively.

Having fully described my invention what I claim and desire to secure by Letters Patent is:

1. Means whereby matter under control at a given place may be displayed by a projector or projectors at another place, each projector comprising a set of discs concentrically mounted a set of transparencies arranged on each disc in a circle concentric with the disc 'with one blank space in the circle through which the light ,beam` canpass, electrically controlledmeans for moving the set of discs axially to bring any desired one of them into the inner -focal plane of. the projector, and electrically controlled means for turning such disc only to bring any desired one of its transparencies into the beam of light of the projector.

' 2. Means whereby matter under control at a given place may be displaced by` a Vprojector or projectors at another place, each projector comprising a .set of discs concentrically mounted a set of transparencies arranged on each disc ina circler concentric with the disc with one blank `space in the circle through `which the light beam can pass, electrically controlled` means for moving the set of discsaxially to bring any desired one of them into the inner focal `plane of the projector, electrically controlled means for turning such disc only to 'bring any desired `one of its transparenciesinto the beam of light of the projector, dialing means comprising two discs with numbers thereon, the dialing of each disc causing a number of electric impulses to be transmitted to each projector, and means in each projector affected by the said impulses to move the transparency-carrying discs axially endwise and to turn them by the requisite amount to display the image of the required transparency.

3. In combination with the mechanism dened in claim 2, a notched wheel with which each dialing disc is connected, an arm engaged by the notches and capable of being rocked by the notches, and a contact stud with which the arm is capable of making a number of contacts to cause the aforesaid electric impulses.

4. Incombination with the mechanism defined in claim 2, one dialing disc being formed as an outer disc and the other dialing disc being formed as an inner disc, the outer `disc having tabs numbered as tens and the inner disc having tabs Y numbered as units whereby after dialin-g the inner disc it is held in its dialed position, a clutch device holding the inner disc in its dialed position, and a ratchet and pawl device holding the outer disc from returning after dialing, and electro-magnetic means for freeing said ratchet and pawl device.

5. In combination with the mechanism defined in claim 2, one dialing disc being formed as an outer disc and the other dialing disc being formed as an inner disc, the outer disc having tabs numbered as tens and the inner disc having tabs numbered as units whereby after dialing the inner disc it is held in its dialed position, a clutch device holding the inner disc in its dialed position, and a ratchet and pawl device holding the outer disc from returning after dialing, and electro-magnetic means for freeing said ratchet and pawl device, means, including a, knob for returning the dialing discs to bring them to their normalposition after they have been dialed, a clutch freed thereby, and an electro-magnetic device to.

which a current is closed by the clutch to release the ratchet and pawl device.

6. In combination with the mechanism defined in claim 1, a screw device for moving the discs of each projector axially, a notched wheel actuating said screw device, a pawl engaged by the notched wheel to impel the notched wheel, and a solenoid moving the pawl and under the influence of electric impulses sent from the dialing apparatus.

7. In combination with the mechanism defined.

in claim 1, a spindle affecting the rotation of the discs of each projector, a notched Wheel driving vthe said spindle, a paWl engaging the notched wheel, and al solenoid moving the pawl to impel the notched wheel under the influence of electric impulses sent from the dialing apparatus.

8. In combination with the mechanism defined in claim ,1, a spindle affecting the rotation of the discs of each projector, a notched Wheel driving the said spindle, a paWl engaging the notched Wheel,. and 'a solenoid moving the pawlrt'o impel the notched Wheel under the influenceof electric impulses sent from the dialingv apparatus, electrofmagnetic means reversing the pawls Which effect the movement of the discs of each proje'ctor,` and:means controlling the electro-magnetic means and releasing the dialing discs to allow'them to return to their normal position.

79. In combination with the mechanism defined in claim 1,.means for carrying the transparencies, a set of co-axial discs in which the transparencies are carried, each discV having one unfilled recess through which lightl can pass freely, one only of such discs being turned at a time, the others being locked in such Ipositions that their open recesses lie in the line of projected light, each disc having a notch, a common locking yplate adapted to be received by said notch, the locking plate having a notchwhich when opposite a disc which lies in the inner focal plane allows said disc to be turned, the other discs remaining locked.

`10. In combination withk the mechanism defined in claim 1, an'arbor passing axially through the dialing discs and their respectivev notched wheels and carrying one of the clutch parts, whereby when said arbor is pressed endwise it frees said clutch', a circuit whi-ch is thereby also closed, electro-magnetic means connected with the circuit which free the one dialing disc, and electro-magnetic means which reverse the pawls 2Q of each projector.

BEATRICE NORAH CARRINGTON. 

